Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that a part of the car's engine system, which helps it to run smoothly, is not working properly. It's like a broken wire in a toy that stops it from working.
The P1375 code indicates a problem with the ionic current signal amplification control circuit in the engine's Bank 2. This circuit is responsible for monitoring the combustion process in the engine cylinders.
The ionic current signal amplification control circuit is part of the engine's ignition system. It detects the ionization current (a result of combustion) in the cylinders to monitor combustion quality. An 'open' circuit means there is a break or disconnection in the wiring or components that make up this circuit, preventing it from functioning correctly.
• Check Engine Light is on
• Engine misfires
• Poor engine performance
• Faulty ignition coil
• Damaged wiring or connectors
• Defective control module
Ignition Coil: A component that transforms the battery's voltage to a much higher voltage to ignite the fuel.
Control Module: An electronic device that controls various functions of the vehicle's engine.
• Use an OBD-II scanner to confirm the code.
• Inspect the ignition coils and wiring for damage.
• Test the control module for proper operation.
• Replace faulty ignition coil.
• Repair or replace damaged wiring or connectors.
• Replace the defective control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Chevrolet Malibu
• Pontiac Grand Am
• Buick Regal
• Regular maintenance checks
• Inspect ignition system components periodically
• Ensure proper electrical connections
Sensor Issue
• Do not ignore the Check Engine Light.
• Get the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle if it shows severe symptoms.
Check with your vehicle manufacturer for warranty coverage on ignition system components.
This code has been more common in older vehicles with high mileage, often due to wear and tear in the ignition system.
Moderate – It should be addressed soon to prevent further damage.
Driving with a malfunctioning ignition system can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle stationary
The ionic current signal amplification control circuit is typically located near the ignition coils on the engine.
Q: Can I drive with a P1375 code?
A: It's not recommended to drive for long periods with this code, as it can lead to engine performance issues.
Q: Will the P1375 code cause my car to fail emissions tests?
A: Yes, if the ignition system is not functioning properly, it could cause increased emissions.
High-End · Full-system diagnostics
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Network faults often require full-system access instead of a generic code reader alone.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.